|Spencer Tracy (1900 - 1967)|
|Captains Courageous (1937) [Manuel Fidello]: Drowned after he gets caught in the rigging and pulled overboard (then orders Lionel Barrymore to cut the ropes so that the ship can go on without him). (Thanks to Jennifer)
Test Pilot (1938) [Gunner Morris]: Crushed by a load of sandbags during a test flight; he dies shortly afterwards while talking to Clark Gable. (Thanks to Jennifer)
Dr. Jekyll and Mr. Hyde (1941) [Dr. Henry Jekyll/Mr. Hyde]: Shot three times in the chest by Ian Hunter when Spencer comes at Ian with a knife. In death, his body transforms from Hyde back to Jekyll.
A Guy Named Joe (1943) [Major Pete Sandidge]: Killed in a plane crash after being wounded in a firefight with a German plane (and ordering the rest of his crew to bail out). He appears as a ghost throughout the rest of the movie. (Thanks to Stephen)
Broken Lance (1954) [Matt Devereaux]: Dies of a heart attack (due to overexertion while recovering from a stroke) while pursuing his sons on horseback. (Thanks to Brian)